Hi Ron, There is some inaccuracy in your statement. First of all, neither of the products mentioned by Bill are with behavioral simulators only. S-parameter support in HyperLynx and others is made through ELDO kernel that is a TRUE circuit simulator, with all conventional models included. >ALL THE SIMULATION TOOLS YOU USE, USE ONLY A SINGLE FREQUENCY ATTENUATION >FACTOR FOR ANY OF THE S-PARAMETERS.. >Only ADS uses a convolution of the impuse response obtained from the S->Parameters to convert the the model back into the time domain.. Anything >less is only an approximation. Funny to read this after working on this S-parameter code - CPF - personally and spending years verifying simulation accuracy. Currently, the model we have supports 3 different methods: direct convolution (by finding impulse response by IFFT), recursive convolution or CPF, with pole/residue representation of the dependence, and the system identification method. How about the following: defining arbitrary multiport consisting of many RLC components, controlled sources, W-elements, other S-parameters, then generating the entire S/Y/Z parameters for this multiport. After that, replacing the original linear multiport with the S-model created and performing time domain simulation. The results are undistinguishable if compared to the time domain simulation when the original RLC... multiport. Even better: simulation time is reduced because internal nodes/elements are excluded and accuracy is higher for larger step... because LTE is excluded, too. Number of ports: 40, 68, 158, 226... etc. Vladimir >From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On >Behalf Of ron@xxxxxxxxxxx >Sent: Wednesday, December 26, 2007 2:32 PM >To: Hargin, Bill >Cc: codymiller@xxxxxxxxxx; si-list@xxxxxxxxxxxxx >Subject: [SI-LIST] Re: S parameter to time domain signal >Hi Bill and Cody >The beharioural simulators you mention do not accurately simulate the time >domain simulations. Where no great deal of accuracy is required these >simulatiors provide a minimum level of assurance that a circuit may >operate.=20 >The strength of the beharioural simulators is only in their fast simulation >time and in the tie-in to the board layout software. Quick and easy but >weak in accuracy. >Spice type simulators are quite a bit better, take more time to run but do >not show frequency dependent loss.=20 >ALL THE SIMULATION TOOLS YOU USE, USE ONLY A SINGLE FREQUENCY ATTENUATION >FACTOR FOR ANY OF THE S-PARAMETERS.. >Only ADS uses a convolution of the impuse response obtained from the S->Parameters to convert the the model back into the time domain.. Anything >less is only an approximation. >Ron Miller Hargin, Bill wrote: >Hi Cody/Ron: > > =20 > >>>Does anyone in the group know of any available software >>> =20 >>> >>packages that >> =20 >> >>>can take post measurement S11 data and convert it to a time = domain=3D20 >>>reflected signal? >>> =20 >>> > >While it's true that tools with RF roots perform this analysis, we've >offered this functionality for years ourselves, and I'm sure there are=20 >several others offering this functionality ... 3 Mentor tools that do >this: > > HyperLynx: Pre- and post-layout; Works in any PCB flow. > ICX: Primarily for floorplanning and post-layout; Board Station and >Expedition. > ICX Pro: Pre- and post-layout; Tightly integrated into the=20 >Expedition flow. > > >Bill Hargin >High-Speed Marketing Manager >Mentor Graphics Corp. >Systems Design Division >425-301-4425 - Mobile=3D20 > >=3D20 > > > =20 > >>-----Original Message----- >>From: si-list-bounce@xxxxxxxxxxxxx=3D20=20 >>[mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of ron@xxxxxxxxxxx >>Sent: Friday, December 21, 2007 3:51 PM >>To: codymiller@xxxxxxxxxx >>Cc: si-list@xxxxxxxxxxxxx >>Subject: [SI-LIST] Re: S parameter to time domain signal =3D20 Hi Cody >>=3D20 ADS is the only tool that takes complex S-Parameter data as = a=3D20=20 >>model and simulates the time domain signals including reflections. >>=3D20 >>Call Agilent.... Lease is about 20K per year fully supported =3D20 Ron = >>Miller =3D20 =3D20 codymiller@xxxxxxxxxx wrote: >>=3D20 >> =20 >> >>>All, >>> >>>Does anyone in the group know of any available software=3D20 >>> =20 >>> >>packages that=3D20 >> =20 >> >>>can take post measurement S11 data and convert it to a time = domain=3D20 >>>reflected signal? >>> >>>Thanks, >>>Cody Miller >>>------------------------------------------------------------------ >>>To unsubscribe from si-list: >>>si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field >>> >>>or to administer your membership from a web page, go to:=20 >>>//www.freelists.org/webpage/si-list >>> >>>For help: >>>si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field >>> >>> >>>List technical documents are available at: >>> http://www.si-list.net >>> >>>List archives are viewable at: =3D20 >>> //www.freelists.org/archives/si-list >>>or at our remote archives: >>> http://groups.yahoo.com/group/si-list/messages >>>Old (prior to June 6, 2001) list archives are viewable at: >>> http://www.qsl.net/wb6tpu >>>=3D20 >>> >>> >>>=3D20 >>> >>> =20 >>> >>=3D20 >>=3D20 >>-- >>Ronald B. Miller, Microwave/SI Engineer RAIL =3D3D NOISE + = REFLECTIONS >>Gigahertz Data Div of MI Corp. \\ // \\ //=3D20 >>7721 Sunset Avenue \\// \\// >>Newark, CA 94560 ->JITTER<- EYE ->JITTER<- >>tel 510-793-4744, //\\ //\\ >>fax 510-742-6686 // \\ // \\ >>www.ghzdata.com RAIL =3D3D NOISE + REFLECTIONS=3D20 >> =3D20 >> =3D09 >> =3D09 >>=3D20 >>------------------------------------------------------------------ >>To unsubscribe from si-list: >>si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field >>=3D20 or to administer your membership from a web page, go to: >>//www.freelists.org/webpage/si-list >>=3D20 >>For help: >>si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field =3D20 = =3D20 >>List technical documents are available at: >> http://www.si-list.net =3D20 >>List archives are viewable at: =3D20 >> //www.freelists.org/archives/si-list >>or at our remote archives: >> http://groups.yahoo.com/group/si-list/messages >>Old (prior to June 6, 2001) list archives are viewable at: >> http://www.qsl.net/wb6tpu >> =3D20 >>=3D20 >>=3D20 >> =20 >> >------------------------------------------------------------------ >To unsubscribe from si-list: >si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field > >or to administer your membership from a web page, go to:=20 >//www.freelists.org/webpage/si-list > >For help: >si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field > > >List technical documents are available at: > http://www.si-list.net > >List archives are viewable at: =20 > //www.freelists.org/archives/si-list >or at our remote archives: > http://groups.yahoo.com/group/si-list/messages >Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > =20 > > > =20 > -- Ronald B. Miller, Microwave/SI Engineer RAIL =3D NOISE + REFLECTIONS Gigahertz Data Div of MI Corp. \\ // \\ //=20 7721 Sunset Avenue \\// \\// Newark, CA 94560 ->JITTER<- EYE ->JITTER<- tel 510-793-4744, //\\ //\\ fax 510-742-6686 // \\ // \\ www.ghzdata.com RAIL =3D NOISE + REFLECTIONS=20 =20 =20 ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List technical documents are available at: http://www.si-list.net List archives are viewable at: =20 //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu =20 ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List technical documents are available at: http://www.si-list.net List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu